Harshad K. D. H. Bhadeshia is the Emeritus Tata Steel Professor of Metallurgy at the University of Cambridge and Professor of Metallurgy at Queen Mary University of London. His main interest has been on the theory of solid-state phase transformations with emphasis on the prediction and verification of microstructural development in complex metallic alloys, particularly multicomponent steels. He has authored or co-authored some 700 research publications. His books include Bainite in steels (3rd edition 2015), Steels (5th edition 2024, with Robert Honeycombe), Geometry of crystals, poly-crystals and phase transformations (2018), Theory of transformations in steels (2021), Innovations in everyday engineering materials (2021, with Tarashankar DebRoy) and Phase transitions (2023 with Haixue Yan). He became a Fellow of the Royal Society in 1998, of the Royal Academy of Engineering in 2002, a Foreign Fellow of the National Academy of Engineering (India) in 2004 and was awarded the Bessemer Gold Medal in 2006. Professor Bhadeshia was appointed a Knights Bachelor in the Queen’s Birthday Honours for services to science and technology.